31352218231 has 16 divisors (see below), whose sum is σ = 33716390400. Its totient is φ = 29059898688.

The previous prime is 31352218207. The next prime is 31352218241. The reversal of 31352218231 is 13281225313.

It is not a de Polignac number, because 31352218231 - 2⁵ = 31352218199 is a prime.

It is a super-2 number, since 2×31352218231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31352218193 and 31352218202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31352218241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3933256 + ... + 3941218.

It is an arithmetic number, because the mean of its divisors is an integer number (2107274400).

Almost surely, 2^31352218231 is an apocalyptic number.

31352218231 is a deficient number, since it is larger than the sum of its proper divisors (2364172169).

31352218231 is a wasteful number, since it uses less digits than its factorization.

31352218231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12438.

The product of its digits is 8640, while the sum is 31.

The spelling of 31352218231 in words is "thirty-one billion, three hundred fifty-two million, two hundred eighteen thousand, two hundred thirty-one".